EP 0241785 A3 19900328 - OUTPUT DRIVER CIRCUIT
Title (en)
OUTPUT DRIVER CIRCUIT
Publication
Application
Priority
JP 7290386 A 19860331
Abstract (en)
[origin: EP0241785A2] An output driver circuit comprises an output NPN transistor (Tr1), a control NPN transistor (Tr2), and a protection circuit (14) for protecting the output transistor (Tr1) from being destroyed. The protection circuit (14) detects a collector current of said output NPN transistor (Tr1) and changes a base current of said control NPN transistor (Tr2).
IPC 1-7
IPC 8 full level
H03K 17/08 (2006.01); H03F 3/34 (2006.01); H03F 3/343 (2006.01); H03F 3/347 (2006.01); H03K 19/003 (2006.01)
CPC (source: EP US)
H03K 19/00307 (2013.01 - EP US)
Citation (search report)
- [A] US 4359652 A 19821116 - JARRETT ROBERT B, et al
- [A] US 4533839 A 19850806 - BALAKRISHNAN RAMANATHA V [US]
- [A] US 4555742 A 19851126 - GRAY RANDALL C [US], et al
- [A] DE 2351732 A1 19740606 - SONY CORP
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0241785 A2 19871021; EP 0241785 A3 19900328; EP 0241785 B1 19930120; DE 3783640 D1 19930304; DE 3783640 T2 19930513; JP H0683042 B2 19941019; JP S62230216 A 19871008; US 4787007 A 19881122
DOCDB simple family (application)
EP 87104524 A 19870326; DE 3783640 T 19870326; JP 7290386 A 19860331; US 2467287 A 19870311